Family: Poaceae
[ Arundo agrostoides Pursh , more, Arundo canadensis Michx., Arundo cinnoides Muhl., Arundo conoides Eaton, Arundo fissa Willd. ex Steud., Calamagrostis agrostoides (Pursh) Pursh ex Spreng., Calamagrostis blanda Beal, Calamagrostis canadensis var. campestris Kearney, Calamagrostis canadensis var. langsdorfii (Link) Inman, Calamagrostis langsdorfii var. marylandica Trin., Calamagrostis michauxii Trin. ex Steud., Calamagrostis oregonensis Buckley, Cinna purshii Kunth, Deyeuxia canadensis (Michx.) Munro ex Hook., Deyeuxia dubia , Deyeuxia nuttalliana (Steud.) Vasey] |
Culms 5-15 dm, often branched above, smooth, clustered on creeping rhizomes; sheaths glabrous or nearly so; ligules 3-8 mm; blades scabrous on both sides, flat, 4-8 mm wide; infl somewhat nodding, 8-25 cm, open or fairly dense, but not contracted, the longer branches 3-8 cm; spikelets 2-6 mm; glumes subequal or the second slightly longer, acute to acuminate, rounded or keeled, glabrous to scabrous-puberulent on the sides; lemma nearly or quite smooth, translucent at the dentate or erose tip, three-fourths to fully as long as the glumes; awn delicate, erect, straight or nearly so, inserted near the middle of the lemma; callus-hairs abundant, nearly as long as the lemma; rachilla-vestige 0.1-0.3 mm, hairy throughout; 2n=42-66. Open swamps, wet meadows, and prairies, or moist or wet soil in the mts.; Greenl. to Alas., s. to N.C., Mo., and Ariz. Highly variable, but not readily divisible into vars. (C. macouniana, the small-fld extreme; C. langsdorffii, the large-fld extreme; C. nubila)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
©The New York Botanical Garden. All rights reserved. Used by permission. |